Here we will give an example of how to create ASP.NET MVC 5 page with examples, they can be seen on ASP.NET MVC framework to be displayed on the web browser. We are going on to describe some things about the basics of ASP.NET MVC that should be known.

You need to know what is included on the MVC Pattern Architectural Pattern. And software design pattern that is used in ASP.NET MVC is Front Controller, which means that the control will be concentrated in a class alone. While ASP.NET Web Forms is different because it has a controller on each page.

Here's how the MVC, can be seen in the following figure

In ASP.NET MVC 5, the address will be written in the address bar on your web browser does not show as physical files, because of the configuration and routing processes that can be seen in Global.asax.cs and RouteConfig.cs file (folder App_start).

Global.asax file can also be found on the project ASP.NET Web Forms, this file serves as an application file that is responsible for the events at the application level is raised by ASP.NET or HttpModules. At the time the application is run, namely on Application_Start method, can be seen there are file event handling. Then it can be seen on these methods belong to the class RouteConfig. Here is the content of the class RouteConfig residing on file in the folder App_Start RouteConfig.cs.

It can be seen that the name of the default controller is used in this application is Home. This means that if you follow the code needs to be created with the name of the Home controller class, and then save it in a folder Controllers.

To add this class please right click on the folder and select Add Controller > Controller

Select the MVC Controller 5 - Empty and then click the Add button.

It will display a window Add Controller that serves to give the name of the controller class that will be created. For example, assign a name to the Home Controller Controller name column, then click the Add button.

Here is the content of the class controller of HomeController that have been made :

Then make special view for HomeController class in Home folder with index.cshtml. Then right click on the Home folder, then choose Add > New Item. After that, Choose MVC 5 View Page, give a name as you desire, click Add button.

Then you can modify Index.cshtml file like this :

You can try it on your web browser, then this will be the result

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In the RavenDB mailing list, How to combine the standard unit of work pattern of working with RavenDB in MVC applications with async. In particular, the problematic code was:

public class HomeController : Controller
   {
        public IAsyncDocumentSession Db { get; set; }
        public async Task<ActionResult> Index()
       {
            var person = new Person {Name = "Khalid Abuhakmeh"};
            await Db.StoreAsync(person);     

          return View(person);
       }
           protected override void OnActionExecuting(ActionExecutingContext filterContext)
       {
           Db = MvcApplication.DocumentStore.OpenAsyncSession();
           base.OnActionExecuting(filterContext);
       }

       protected override void OnActionExecuted(ActionExecutedContext filterContext)
       {
           Db.SaveChangesAsync()
               .ContinueWith(x => { });
           base.OnActionExecuted(filterContext);
       }
    lic class Person
       {
           public string Id { get; set; }
           public string Name { get; set; }
       }
   }

As you probably noticed, the problem Db.SaveChangesAsync(). We want to execute the save changes in an async manner, but we don’t want to do that in a way that would block the thread. The current code just assume the happy path, and any error would be ignored. That ain’t right. If we were using Web API, this would be trivially easy, but we aren’t. So let us see what can be done about it.

I created a new MVC 4 application and wrote the following code:

As you can see, I have a break point after the await, which means that when that break point is hit, I’ll be able to see what is responsible for handling async calls in MVC4. When the breakpoint was hit, I looked at the call stack, and saw:

Not very useful, right? But we can fix that:

And now we get:

This is a whole bunch of stuff that doesn’t really help, I am afraid. But then I thought about putting the breakpoint before the await, which gave me:

And this means that I can check the code here. I got the code and started digging. At first I thought that I couldn’t do it, but then I discovered that I could. See, all you have to do is to create you own async action invoker, like so:

 public class UnitOfWorkAsyncActionInvoker : AsyncControllerActionInvoker
    {
        protected override IAsyncResult BeginInvokeActionMethod(
            ControllerContext controllerContext,
            ActionDescriptor actionDescriptor,
            IDictionary<string, object> parameters, AsyncCallback callback,
            object state)
       {
            return base.BeginInvokeActionMethod(controllerContext, actionDescriptor, parameters,
                                               result => DoSomethingAsyncAfterTask().ContinueWith(task => callback(task)),
                                               state);
       }
       public async Task DoSomethingAsyncAfterTask()
       {
           await Task.Delay(1000);
       }
   }
And then register it :

   DependencyResolver.SetResolver(type =>
       {
           if (type == typeof (IAsyncActionInvoker))
               return new UnitOfWorkAsyncActionInvoker();
           return null;
       }, type => Enumerable.Empty<object>());

Note: Except for doing a minimum of F5 in the debugger, I have neither tested nor verified this code. It appears to do what I want it to, and since I am only getting to this because a customer asked about this in the mailing list, that is about as much investigation time that I can dedicate to it.